基于合并与典型化的三维城市模型综合  

Generalization of 3D City Models Combining Aggregation and Typification

作　　者：毛波[1] 曹杰[1] 伍之昂[1] 

机构地区：[1]南京财经大学电子商务江苏省重点实验室,南京210003

出　　处：《系统仿真学报》2013年第11期2649-2654,共6页Journal of System Simulation

基　　金：国家自然科学基金(41201486);国家科技支撑计划(2013BAH16F00);国家科技攻关子课题(SQ2011GX07E03990);国家农业科技成果转化资金项目(2011GB2C100024);江苏省高等学校优秀科技创新团队(2011013);国际科技合作项目(2011DFA12910);南京物联网工程技术研究中心(2012GCZX089);江苏高校优势学科建设工程资助项目

摘　　要：精细三维城市模型数据量极大,已成为在线可视化的瓶颈。为此,提出一种基于合并与典型化的三维城市模型综合算法,针对三维城市模型中的地标、相邻以及线性分布三类形态,分别实施保留、合并、与典型化操作。设计一种多细节层次的树形结构首次将合并与典型化操作统一到三维模型的综合简化过程中,可以根据实际需求显示不同细节层次的模型,实现动态可视化。在CityGML真实数据集上的实验结果表明,所提出的综合简化方法能在保留原三维模型视觉特征的前提下,有效减少动态显示过程中所需载入的数据量,节省载入时间。The key to 3D city models related applications is the efficient visualization of 3D models for network and mobile devices. However, the existing network bandwidth and the capacity of the mobile devices can not deal with the huge data volume of the 3D city models. The aggregation and typification based 31） city model generalization method were proposed. This method divided the city objects or buildings using Minimum Spanning Tree and analysis the topology of the road networks. For the nearby and linear distributed objects, the aggregation and typification methods were performed respectively to generalize the 31） city models. A multiple representation structure of the 3D city models, GenTree was created to store the middle results of the generalization methods and to support continues scaling. The experiments results indicate that the proposed generalization method can reduce the data volume effectively and the GenTree improves in the dynamic 3D city model visualization.

关 键 词：三维城市模型 多层次细节 合并 典型化 动态显示 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]